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Nervous control of reproduction in Octopus vulgaris: a new model

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Invertebrate Neuroscience

Abstract

The classic study of Wells and Wells on the control of reproduction in Octopus demonstrated that the activity of the subpedunculate lobe of the brain and environmental illumination both inhibit the release of an unknown gonadotropin from the optic gland. This inhibitory control may be exerted by the neuropeptide Phe-Met-Arg-Phe-NH2 (FMRFamide). It was later demonstrated that the olfactory lobe is also likely to be involved in the control of optic gland activity. The presence of gonadotropin-releasing hormone in the olfactory lobe suggested that it might exert an excitatory action on optic gland activity. Other neuropeptides have now been localised in the olfactory lobe: neuropeptide Y, galanin, corticotropin-releasing factor, Ala-Pro-Gly-Trp-NH2 (APGWamide), as well as steroidogenic enzymes and an oestrogen receptor orthologue. This supports the hypothesis that this lobe may also play a part in the control of reproduction in Octopus. The olfactory lobe receives distant chemical stimuli and also appears to be an integrative centre containing a variety of neuropeptides involved in controlling the onset of sexual maturation of Octopus, via the optic gland hormone. This review attempts to summarise current knowledge about the role of the olfactory lobe and optic gland in the control of sexual maturation in Octopus, in the light of new findings and in the context of molluscan comparative physiology.

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Acknowledgments

I am grateful to Dr. John B. Messenger and Dr. Maria Vivo for the helpful discussions and their critical revision of the manuscript.

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  1. Department of Biological, Geological and Environmental Sciences, University of Sannio, Via Port’Arsa, 11, Benevento, Italy

    Carlo Di Cristo

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Correspondence to Carlo Di Cristo.

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This article forms part of a special issue on Cephalopod Biology under the auspices of CephRes-ONLUS (http://www.cephalopodresearch.org).

Guest Editor: Graziano Fiorito.

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Di Cristo, C. Nervous control of reproduction in Octopus vulgaris: a new model. Invert Neurosci 13, 27–34 (2013). https://doi.org/10.1007/s10158-013-0149-x

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